r/netsec • • 29m ago

Security Issues in Cloud Computing: 6 Common Threats and Risks

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• Upvotes

r/netsec • • 5h ago

frontier class vulnerabilities: it gets worse before it (maybe) gets better

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6 Upvotes

r/netsec • • 21h ago

CVE-2026-91768: FastCGI allowed_clients compared only 96 of an IPv6 address's 128 bits

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80 Upvotes

r/netsec • • 21h ago

LG webOS sync-demo Preauth RCE

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12 Upvotes

An exploit chain was found in LG webOS, leading to root command execution. The chain starts with a client-key issuance bypass, progresses through service-level access, and ultimately leads to root command execution.


r/netsec • • 23h ago

Google paid me $90,000 for this RCE

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405 Upvotes

r/netsec • • 1d ago

Telegram Desktop vulnerability allowed any user file to be stolen

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155 Upvotes

r/netsec • • 2d ago

A story of wifi secrets, UART lockdowns and a damaged flash memory chip

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34 Upvotes

r/netsec • • 2d ago

GitHub Actions leaking secrets when Miri output is cached

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4 Upvotes

r/netsec • • 2d ago

Smashing the token limit with overlapping fragments (CSS injection token exfiltration, PortSwigger Research)

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4 Upvotes

r/netsec • • 3d ago

Death By A Thousand PaperCuts (PaperCut Pre-Auth RCE Chain and Patch Bypasses WT-2026-0141-0144/CVE-2026-82077/CVE-2026-82078/CVE-2026-81578) - watchTowr Labs

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50 Upvotes

r/netsec • • 4d ago

Pending Moderation A JPEG, a Race, and a Ghost: Breaking Discourse's Image Pipeline

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7 Upvotes

r/netsec • • 4d ago

How We Found Thousands of Exposed NVIDIA GPUs and a Way to Disrupt Them (CVE-2026-47483)

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113 Upvotes

TL;DR: NVIDIA DCGM Exporter is a widely used monitoring tool that collects GPU metrics like utilization, memory, temperature, and power consumption from AI servers.
We discovered that thousands of these monitoring endpoints are exposed to the public internet, allowing anyone to inspect GPU infrastructure. Worse, we found a high-severity vulnerability (CVE-2026-47483, CVSS 8.2) that lets unauthenticated attackers exhaust server resources, crash GPU monitoring, and potentially disrupt AI workloads remotely.
A few other interesting findings:
2,100+ exposed GPU servers, revealing telemetry from 12,000+ GPUs worth ~$100M, including H100s, H200s, and Blackwell GPUs.
60% of exposed GPUs reported 0% utilization across our scans.
12,096 additional servers exposed infrastructure details, including OS, firmware, and networking information.
NVIDIA fixed the vulnerability following our responsible disclosure.
Full research: https://lava.security/research/cve-2026-47483-nvidia-dcgm-exporter-vulnerability


r/netsec • • 4d ago

Tool Release Loupe: An Android Console in the Browser

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7 Upvotes

r/netsec • • 4d ago

A Single POST Freezes Any Next.js Server

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127 Upvotes

r/netsec • • 5d ago

I found yet another way to invoke JavaScript functions without parentheses

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85 Upvotes

It turns out you can overwrite the Error.prepareStackTrace method with the function constructor. Then, using prototype pollution, you can inject valid JavaScript code to generate arbitrary functions and invoke it using the usual tricks.


r/netsec • • 5d ago

CVE-2026-102489 Deep-Dive: Zammad Session Leak to RCE

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26 Upvotes

r/netsec • • 6d ago

You Won’t Hear About These, Even In Myths (Atlassian Jira, Confluence (and more) Pre-Auth Arbitrary File Read CVE-2026-21589) - watchTowr Labs

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65 Upvotes

r/netsec • • 6d ago

Teaching network intrusion in the funnest way possible

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39 Upvotes

I wanted to share a project I’ve been working on that I’m super excited about:

Project RedTeam: Contract Offensive

There’s a free Demo that provides a tutorial and lets you play a few contracts (no time limit, play as much as you want). Some players are already pulling some serious hours in the demo!

At its core, this is a game about using MITRE ATT&CK adversarial techniques against procedurally generated networks. It's delivered in a gameplay loop that plays a lot like Balatro and other card based Roguelike games. In Project RedTeam, you need to earn money to pay off debts after every contract within a run. Earn money by completing objectives, side bounties, or executing exfiltration/ransom against targets- the choice on how to be profitable is always yours.

It's a challenging but fun and fast paced take on network-intrusion cybersecurity concepts. It's entertaining in a deliberately gamified way.

A goal of this project was to create a hacking game that is realistic enough to keep it meaningful as a tool to teach intrusion concepts and stages to anyone- but not be overcomplicated and slow-paced like most hacking games.

I've put a lot of thought into the design and dynamics of how to capture the core-loop of network intrusion and turn it into a game that's approachable. The design direction of this project is an outcome of having over a decade of training and experience in cybersecurity.

Feel free to AMA! I'm happy to answer any questions about the game and/or development process :)

Give the game a Wishlist on Steam or share this post if it's something you support and want to see further development on.

Project background: This was implemented over the past 3 months using a modern development workflow (yes, modern AI tools make this possible- I'm not hiding that fact!). That being said, this is by far the most complex software project I've built as a solo developer and it was not an easy or simple development task. There's a Steam Community with a Dev Blog for this game that provides more history/progress updates on the project.

Mods: This will be my only and last post here, since it is promotional. I just wanted to share this since there’s been very positive interest from similar subreddits.


r/netsec • • 7d ago

Wordpress libheif RCE

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16 Upvotes

r/netsec • • 7d ago

Pending moderation (Tool post) Open Build Service, one year later: command execution through Mercurial argument injection

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29 Upvotes

r/netsec • • 8d ago

How to Hack Time, With C2PA

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31 Upvotes

r/netsec • • 10d ago

RCE and bad crypto in Internxt's 'post-quantum' cloud storage

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31 Upvotes

Internxt is a post-quantum secure encrypted cloud storage provider which is open-source and has passed multiple independent audits.

I reviewed their code and found that post-quantum security should have been the least of their problems. Clicking a link in your browser could trigger remote code execution on the desktop app or leak your long-term encryption keys to an attacker-chosen URL. Their cryptographic architecture stands on shaky grounds with public keys never being verified, in some cases man-in-the-middled by design, a flat key hierarchy and a KDF with just 3 iterations of MD5.

We need PQC and we need it now, but adding a (self-rolled) PQC hybrid on top of a weak protocol does not make it more secure.


r/netsec • • 10d ago

A peek into Reddit's anti-spam internals

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9 Upvotes

r/netsec • • 10d ago

security.txt on the Czech web: Scanning 1k popular .cz domains

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1 Upvotes

r/netsec • • 10d ago

Bypassing Secure Boot via Unbounded RLE8 Splash Images in U-Boot (CVE-2026-71972)

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42 Upvotes

When analysing firmware attack surfaces, image decoders built into bootloaders get less scrutiny than cryptographically verified OS kernels. If image parsing happens before signature verification, any memory corruption in the parser breaks the secure boot trust model.

researchers analysed U-Boot's video subsystem (drivers/video/video_bmp.c) and identified an unbounded write in the RLE8 bitmap decoder (video_display_rle8_bitmap()) that leads to a pre-authentication Secure Boot bypass.

Root Cause and Vulnerability Mechanics

When U-Boot displays a boot logo or splash screen, it parses a BMP image loaded from local storage (SPI flash, MMC/eMMC, USB, or SD card).

Unbounded framebuffer write: During RLE8 decompression, video_display_rle8_bitmap() decodes run-length encoded streams directly into the active framebuffer without validating stream bounds against the frame boundary or allocated buffer size.

Pre-authentication execution window: In many embedded target configurations, the boot splash screen is rendered immediately on startup, before U-Boot calls Android Verified Boot (AVB) or FIT image signature verification routines.

Storage disparity: The kernel image and rootfs are signed, but splash images are frequently stored in unsigned, user-writable partitions or external media.

An attacker who writes a crafted RLE8 BMP to the boot storage can trigger an out-of-bounds write past the framebuffer during early boot, corrupting adjacent bootloader data structures, function pointers, or verification flags in memory.

This hijacks the execution flow before signature checking completes.